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crypto: aes - create AES library based on the fixed time AES code

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Take the existing small footprint and mostly time invariant C code
and turn it into a AES library that can be used for non-performance
critical, casual use of AES, and as a fallback for, e.g., SIMD code
that needs a secondary path that can be taken in contexts where the
SIMD unit is off limits (e.g., in hard interrupts taken from kernel
context)

Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Ard Biesheuvel 2019-07-02 21:41:22 +02:00 • committed by Herbert Xu
commit e59c1c9874
5 changed files with 394 additions and 300 deletions
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4
crypto/Kconfig
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@ -1066,6 +1066,9 @@ config CRYPTO_GHASH_CLMUL_NI_INTEL
comment "Ciphers"
config CRYPTO_LIB_AES
tristate
config CRYPTO_AES
tristate "AES cipher algorithms"
select CRYPTO_ALGAPI
@ -1089,6 +1092,7 @@ config CRYPTO_AES
config CRYPTO_AES_TI
tristate "Fixed time AES cipher"
select CRYPTO_ALGAPI
select CRYPTO_LIB_AES
help
This is a generic implementation of AES that attempts to eliminate
data dependent latencies as much as possible without affecting